Thermostatic control valve



June Z0, 1950 w. A. KYsoR 2,512,548

THERMOSTATIC CONTROL VALVE Filed March 4, 1949 Patented June 20, 1950ice l l 2,512,543 n THERMos'rATIoiooNTRoL VALVE Walter A. Kysor,Cadillac, Mich.,y assignor to vKysor Heater Company, Cadillac, Mich.

' 'Application March 4, 1949, Serial No. 79,669

I 1 2 Claims. (Cl. 236-997) the control valve of automatic shuttercontrol mechanism for Vautomotive radiators such as disclosed in mypatent entitledShutter Mechanism and Thermostatic- Control Therefor,Number 2,248,094, issued July 8, 1941. v

The principal objects of this invention are:

First, to provide a -thermostatic control valve y l assembly-whichiseasily adjusted without theuse vof wrenches.

Third, to provide. a control valve assembly which l is easily removablefrom an engineufor repair or adjustment of the valve without drainingthe cooling iiuid from the engine. w y

Fourth, vto provide a control valve with a positively sealing valve.

Other objects and advantages relating to details of my invention will beapparent from a consideration of the following description and claims. Yl

The drawings, of which there is one sheet, illustrate a preferred formof my valve.

Fig. 1 is a fragmentary plan view of an automobile engine and radiatorillustrating my thermostatic valve operatively conected with shuttermechanism associated with the radiator.

Fig. 2 is a cross lsectional view through the thermostatic valve takenalong the plane of the line 2-2 of Fig. 1, the outlet connection to thevalve being angularly displaced from its position in Fig. 1 to appear inFig. 2. f Fig. 3 is anenlarged fragmentary cross sectional viewillustrating in greater detail thefcon- Vstruction of the valve member'and valve seat Fig. 4 'is a transverse cross sectional view `throughthe valve assembly taken along the plane of the line 4-4 of ligzz. InFig. 1, I have illustrated an internal combustion engine I provided witha radiator 2 and an s."

Aoutlet connection 3 from the engine to the radiator. Mounted on thefront or inlet side of the radiator is a shutter assembly indicatedgenerally at 4. The shutter mechanism is preferably the same as thatdescribed in my previously-mentioned patent in which a series of shuttervanes, not illustrated herein, are actuated vby an air 'cylinder 5operating through a lever 6 and cable 1.

The air cylinder5 is supplied with compressed air through the conduit 8and lter 9 from a suitable source in the vehicle. The -passage of airthrough the conduit 8 is1 controlled by my thermostatically controlledvalve generally indicated at IIl and interposed betweenV two sections ofthe conduit 8.

The valve assembly Ill is connected to a section 'be adjusted.

s 2 formed intermediate of its ends. The interior of the body I2 is thusdivided into abellows chamber I4 and an inletv chamber I5. The partitionI3 is bored axially'of thebody tor receive the valve housing lII whichprojects into .both the bellows chamber and inlet chamber.

The open end of the bellows chamber I4 is internally threaded as at I'Ito engage the threaded shoulder'ona coupling `member I8 and the couplingmember is in turn threadedly engaged with a T I9 formed on theintermediatesection II of the cooling'fluid outlet from. the engine. Thecoupling I8 is internally bored and carries a thermostatic -bulb 2Uprojecting into lthe cooling -fluid passage at onel end and connected toan expansible bellows 2| within the bellows chamber of the valve body.The function of the-bulb 20 and bellows 2I is the same as the similar'elements of my previouslymentioned patent to effect expansion andelongation of the bellows upon an increase in the temperature vofthecoolingl iluid flowing over the end of the bulb 20'. v f

The end of the valve housing I6, which projects into the bellowschamber, is externally threaded asv at 22v andvforms an adjustablesupport for the control wheel 23. A spring 24 is compressed betweenthewheel'23 and bellows 2I to resist the expanding motion of thebellows.

n By moving the wheel 23 along the threaded portion of the valvehousing, the Aability' of the ybellows lto expand can The periphery ofthe wheel 23 is notched as at 25 so that the wheel can bereadily turnedwith the iingers and to provide notches for receiving the spring `detentor holding linger 26. The finger 26 is secured to the inner surfaceofthe bellows chamber by a rivet 21. j A screw 28 extending into thebellows chamber from the outside o f the valve body (see Fig. 4) isYoperative to force the finger into locking ,engagement with the wheel.The wall of the bellows chamber is out away in an arcuate slot 29opposite ythe wheel 23 and spring finger 26 to provide access to theadjusting wheel. The slot 29 is closed against the entrance of dirt landdust bya tubular cylindrical shield 30 tted around the valve bodyA I 2.yThe shield 30 is held in place axially by the head of the screw 28 andrubber rings 3l are mounted around the body I2 to seal the sleeve tothebody. A small vent opening from within the bellowschamber I4 is pro,-vided where the screw 28 passes through the shield The valve housing I6is axially bored to form a valve chamber 32 within whichr the octagonal`valve member 33 is reciprocable. The right end of the valve 33, asviewed in Figs. 2 and 3, is providedwith a ytruncated end cooperativewiththe exhaust valve seat 34 formed in the bore of the valve housing.The valve chamber 32 `communicates with an exhaust passage 35 when theexhaust valve is open, the exhaust passage extending through thethreaded portion '22 ofthe 3 valve housing 'into the bellows chamber I4.Positioned within the exhaust passage 35 is a push pin 3B engageablebetween the opposed ends of the valve member 33 and bellows 2|. The pushpin 36 is of non-circular cross sebtimfas is-"rnst clearly shown inFigs. 3 and 4., and is operative to unseat the exhaust valv'e upon'expansion oi the bellows 2i while permitting the passage of v airthrough the passage 35.

The left end of the valve housing l5, as illustrated in Figs. 2 and 3,is internally threaded to receive the nipple 31. The nipple is axiallybored forming' an inlet passage l38 and the' inner end o'f the passageserves as 'an inlet valvers'eat 39. The left end of the 'valve member 33'is conical shaped to seat against the valve seat 39. I

inlet' 'chamber ,ijof the 'valve body' is internally threaded to receivethe coupling Ml by ineens efw'liieh the end of'V one portion oftheconduit B is eonnec'tedvto the valve assembly.A "The oupling 4U is'recessedrto receive a pad of inter"- ing material 4i and clamp itagainst Ythe inlet endo'f the nipple 31. A

The partition i3 of the-valve-'body'is provided with a 'radially`extending bore- 53 communicating with the valve chamber' through a bore"t2 in thevalve housing IB. Th bore ith'eded to 'exhaust "valve 3lisfclosed. To assure' positive clo' of the exhaust passage; the lexhausti valve .portion of the'valve member ihiis` providediwith .arenecessary.l Attention isl further calledtothe fact that thev valve bodyi2 is easily removed at thethreadedl connection H from the couplingV I8so thatthe cooling 4fluid need not 4be drained from lthe engine inorder. to vremove Ythe valve assembly ,D v

Afor cleaning or repair of its parts.

Having :thus described my invention', what I claim' as new and desire tosecure by Letters Patentis:

l. ,A ther-moeten@ valve assembly comprising 'e cylindrical body memberhaving a bellows chame ber formed in. onel end thereof and van inletchamber formed 'in the other end thereof, a par.- tition between saidchambers, a valve housing extending through said partition `and Yintoeach chamber, the end of said housing within said bellows chamber beingexternally threaded, a coupling l'member threadedly engaged 4with theend of said bellows chamber and having its opposite end threaded forengagement in the wall n of a conduit, heat responsive means `projectingfrom each end of said coupling member and including an expansiblebellows` positioned within said bellows chamber and opposed to the endof 4 saidy valvelhiisiilg, an adjusting 'hand ywheel having a notchedperiphery and thraddly engaged .on the threaded portion of said valvehousing, a

spring compressed between said bellows and said adjusting wheel, thewall of said bellows chamber forming an opening opposite said adjustingwheel,y afsl'eeve slidably mounted around said body' and adapted toclose said opening in said bellows 'chamber wall, dust sealing elementspositioned around said body on each side of said opening and engageablcwith said sleeve, a screw extending through ysaid sleeve and body in thedosed-position 'f said sleeve to etainsaid sleeve passage effsaidexhaust passegedepeilding upon the position of said valve member; anda'spring'- ablel'oek niembe'rseciired to the wail or said' bellowsena-faber having nager 'engageable with thentc-hed periphery of saidwheel tb hold said Wheel in adjusted position, said screw beingengageable said loc'l member to hold said nnger in locki gfpostion'.

Y2=k A' thi-irfnostatic'4 fvalve s'tiiiicture comprising an? elongatedVbb'dy `rrlenber` for-Tmingfa bellows char-nbc'in one end.l th'r'of'and'an 4inlet chamber in the opp'sit'ejend-thereof, valve 'mechanismpositioned-insa'id body-'and extending? between said chambers, a neatresponsive elene'nt responsive mechanism including a bellows adapted! toactuate 'said valve mechanism, an adcompressed between said bellows`andfsa-id adjusting' ii'fheel to oppose' `the `'action of 'said'`bellows; 'the wall off said' bellows chamber torni-ing an arcuateopening opposite said adjusting wheel, afsprmg detentseeur'edwithin saidbellbws'ehamof said opening: and e'rgageable with said sleeve,

and re'ino'vablel screw ineans engageable between said l'sleei're andsaid body to prevent relative axial -lnotion therebetween, said screwbearing against 'said'detentto loek'said detentagains't said wheel.

WALTER 'KYSOR :aliFlaREl\lCEs vCITED The following references' areoflrecord 'ln the l'ilel ofY this-patent:

Unir-ED STATES PATENTS

